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NGC 6709
Observation data (J2000 epoch)
Right ascension	18 51 20.6
Declination	+10° 20′ 02″
Distance	3,510 ly (1,075 pc)
Apparent magnitude (V)	6.7
Apparent dimensions (V)	13'
Physical characteristics
Radius	26 ly (tidal)
Estimated age	141 Myr
Other designations	NGC 6709, Cr 392
Associations
Constellation	Aquila
See also: Open cluster, List of open clusters

NGC 6709 is an open cluster of stars in the equatorial constellation of Aquila, some 5° to the southwest of the star Zeta Aquilae. It is situated toward the center of the galaxy at a distance of 3,510 light-years.

This cluster has a Trumpler class of IV 2 m, and is considered moderately rich with 305 member stars. It is around 141 million years old; about the same as the Pleiades. The core radius of NGC 6709 is 2.2 ly (0.68 pc) and the tidal radius 26.4 ly (8.08 pc). It contains two Be stars and one of them is a shell star. There is one candidate red giant member.

On the evening of November 13, 1984, David H. Levy discovered his first comet less than a degree from this cluster.

Gallery

• Location diagram of NGC 6709

References

1. ^ Cantat-Gaudin, T.; Anders, F. (January 2020). "Clusters and mirages: cataloguing stellar aggregates in the Milky Way". Astronomy & Astrophysics. 633: 22. arXiv:1911.07075. Bibcode:2020A&A...633A..99C. doi:10.1051/0004-6361/201936691. S2CID 208138247. A99.
2. ^ Dib, Sami; et al. (January 2018). "Structure and mass segregation in Galactic stellar clusters". Monthly Notices of the Royal Astronomical Society. 473 (1): 849–859. arXiv:1707.00744. Bibcode:2018MNRAS.473..849D. doi:10.1093/mnras/stx2413.
3. "NGC 6709". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-01-05.
4. Crossen, Craig; Rhemann, Gerald (2012). Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Vienna. p. 58. ISBN 9783709106266.
5. ^ Subramaniam, Annapurni; Sagar, Ram (February 1999). "Multicolor CCD Photometry and Stellar Evolutionary Analysis of NGC 1907, NGC 1912, NGC 2383, NGC 2384, and NGC 6709 Using Synthetic Color-Magnitude Diagrams". The Astronomical Journal. 117 (2): 937–961. Bibcode:1999AJ....117..937S. doi:10.1086/300716. S2CID 34294008.
6. ^ Cole-Kodikara, Elizabeth M.; et al. (March 2021). NGC 6709: A Faint Zero-Age Main Sequence Open Cluster. The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), virtually anywhere, March 2–4, 2021. Bibcode:2021csss.confE.175C. doi:10.5281/zenodo.4565515. 175.
7. Levy, David H. (2003). David Levy's Guide to Observing and Discovering Comets. Cambridge University Press. p. 52.

External links

• Media related to NGC 6709 at Wikimedia Commons
• NGC 6709 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• webda

v t e Constellation of Aquila
Aquila in Chinese astronomy Smith's Cloud List of stars in Aquila
Stars	Bayer α (Altair) β (Alshain) γ (Tarazed) δ ε ζ (Okab) η θ (Tseen Foo) ι κ λ μ ν ξ (Libertas) ο π σ τ υ φ χ ψ ω ω A b c d e f g h i k l Flamsteed 4 5 7 8 10 11 18 19 20 21 22 23 24 42 45 46 51 56 57 58 62 64 66 68 69 70 14 Sge 62 Ser 64 Sgr Variable R U V W TT FF QS V368 V450 V500 V603 V604 V605 V606 V923 V1286 V1291 V1298 V1302 V1315 V1333 V1339 V1427 V1428 V1429 V1472 V1487 V1494 V1654 V1672 V1691 V1703 (Phoenicia) V1828 V1936 HR 7099 7143 7288 7300 7307 7396 7456 7569 7598 7599 7693 7717 7803 HD 179079 183263 187734 192699 (Chechia) Other CoRoT-2 CoRoT-3 CoRoT-8 Gaia BH3 HAT-P-41 PSR J1856+0245 PSR J1903+0327 PSR B1913+16 (Hulse–Taylor) PSR J1951+1123 SGR 1900+14 SS 433 W43A W49-2 WASP-80 (Petra) WD J1953−1019 ZTF J1901+1458
Exoplanets CoRoT-2b CoRoT-3b CoRoT-8b CoRoT-10b HD 179079 b HD 183263 b c HD 192263 b HD 192699 b ξ Aquilae b
Star clusters NGC 6709 NGC 6738 NGC 6755 NGC 6756 NGC 6760
Nebulae	NGC 6741 6751 6778 6781 6790 Other Abell 48 Abell 70 E Nebula Hen 2-428 HESS J1857+026 W43 W49 W49B W50
Galaxies	NGC 6814 Other IC 1327
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